12211222011111 has 16 divisors (see below), whose sum is σ = 18090800064000. Its totient is φ = 8140769319384.

The previous prime is 12211222011097. The next prime is 12211222011119. The reversal of 12211222011111 is 11111022211221.

It is a happy number.

It is not a de Polignac number, because 12211222011111 - 2¹⁰ = 12211222010087 is a prime.

It is a super-2 number, since 2×12211222011111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211222011119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4089090 + ... + 6414288.

It is an arithmetic number, because the mean of its divisors is an integer number (1130675004000).

Almost surely, 2^{12211222011111} is an apocalyptic number.

12211222011111 is a deficient number, since it is larger than the sum of its proper divisors (5879578052889).

12211222011111 is a wasteful number, since it uses less digits than its factorization.

12211222011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519715 (or 2519709 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12211222011111 its reverse (11111022211221), we get a palindrome (23322244222332).

The spelling of 12211222011111 in words is "twelve trillion, two hundred eleven billion, two hundred twenty-two million, eleven thousand, one hundred eleven".